jbd2: Drop unnecessary branch from jbd2_journal_forget()

We have cleared both dirty & jbddirty bits from the bh. So there's no
difference between bforget() and brelse(). Thus there's no point jumping
to no_jbd branch.

Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20190809124233.13277-5-jack@suse.cz


Signed-off-by: Theodore Ts'o <tytso@mit.edu>